Manuscript Summary: The Irish Priscian manuscript of St. Gallen: a copy of the Latin Institutiones Grammaticae by the grammarian Priscian of Caesarea (6th century) with over 9000 glosses, among them 3478 in the Old Irish language. The basis for the reconstruction of the Old Irish language. Contains numerous elaborate pen initials. Written in an Irish scriptorium (Bangor?, Nendrum?) around 845. (smu)